22 lines
525 B
HTML
22 lines
525 B
HTML
<!DOCTYPE html>
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<!-- fieldset with invalid barred for constraint validation element -->
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<html>
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<head>
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<style>
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fieldset:valid { display: none ;}
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</style>
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<script>
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function onloadHandler()
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{
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document.getElementById("fieldset").appendChild(document.getElementById('i'));
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document.documentElement.className = '';
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}
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</script>
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</head>
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<body onload="onloadHandler();">
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<input required readonly id="i">
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<fieldset id="fieldset">
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</fieldset>
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</body>
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</html>
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